This is the 10291st most frequent Russian word.
бразильском
"Бразильском" means "Brazilian" in the prepositional case in Russian.
In this sentence, 'бразильским' is used as an adjective in the instrumental case, describing 'футболом'.
Я интересуюсь бразильским футболом.
I am interested in Brazilian football.
Here, 'бразильском' acts as an adjective in the prepositional case, describing 'карнавале'.
На бразильском карнавале было очень весело.
The Brazilian carnival was very fun.
In this example, 'бразильском' is used as an adjective in the prepositional case, describing 'языке'.